Improvement in shutter-fasteners



AJOHNANDREWS.

Improvement in Shutter Fasteners. N0. 123,074. '.PatentedJamSO,1872.

UNITED STATES JOHN ANDREWS, OF MARLBOROUGH, MASSACHUSETTS.

IMPROVEMENT IN SHUTTER-FASTENERS.

Spcification formi-ng part of Letters Patent No. 123,074, dated January 30, 1872.

To all persons to whom these presents may come:

Be it known that I, JOHN Annnnws, of Marlborough, of the county of Middlesex and State of Massachusetts, have invented a new and useful Improvement in Blind-Fasteners, and do hereby declare the same to be fully described in this my specification, and represented in the accompanying drawing making part thereof, of Which- Figure 1 is a top view of one of my improved fasteners. Fig. 2 is an under-side View of it. Fig. 3 is a side elevation, and Fig. 4. a longitudinal section of it. Fig. 5 is an edge View of the duplex catch-lever, and Fig. 6 is an under-side View of the spring-case.

In its principal features my improved blindfastener is similar to that represented in the United States Patent No. 84,661, dated December 1, 1868, and granted to Frederick Veazie.

The object of my improvement is to simplify the construction of this latter kind of fastener and to enable it to spring not only to be protected to better advantage, but to be applied to the case and slotted and tubular pivot with greater ease and certainty. My improvement also dispenses with the auxiliary pivot cast within and to the spring-case of the said Veazie blind-fastener, thereby simplifying the article, and rendering it cheaper of construction.

In carrying out my invention or improvement, I form the spring-case open at its upper end and closed at its lower or flanged end, except that through such lower end I form concentrically with the box a bearing hole to re ceive the tubular and slotted pivot projecting from the middle of the duplex catch-lever, such pivot being extended upward into the box and through the said hole, so as to be supported by and to bear and turn in such hole while the catch may be turning about on its axis. The helical spring for operating the catch-lever encompassing the pivot, has one end projecting into the slot thereof', and the other into a hole in the side of the box or case.

In the drawing, A denotes the duplex catchlever, formed as shown, and provided with a tubular pivot, a, extended upward from it, there being a slot, b, in suchpivot. The bore of the pivot is continued through the lever,

the screw by which the blind-fastener is to bc secured to a blind being to pass through the pivot, as shown at c in Fig. 7, which is a section of the lower bar of a blind and the fastener as applied thereto. B denotes the springcase, which is cylindrical, and at its upper end is open, and at its lower end is flanged, the ilange d being provided with one or two stops or abutments, e e, for the catch-lever to brin gup against. The lower end of the springcase is closed, except in being provided with the pivot-bearing hole f arranged at the center of the end and concentrically with the case, and having a diameter equal to or a very little greater than that of the pivot a, which is extended up through such hole in manner as shown. G is the helical spring, arranged in the case, and being at one end inserted in the periphery or side thereof, and at the other in the slot of the pivot. By having the case entirely open at its upper end the spring can readily and with certainty be put in place after the introduction, of the pivot of the catchlever into the case; whereas in the Veazie fastener the spring has to be inserted in the case before the application of the catch-lever, thereby requiring the connection of the spring with the catch-lever to be made during the putting together of the case and lever, an operation attended generally with more or less diiculty and uncertainty.

By dispensing with the slot in the pivot and substituting a simple hole therefor to receive the end of the spring, the box and the catchlever will be held in connection by the spring, such being a matter which cannot well be accomplished in the Veazie fastener, on account of the necessity of the slot for connection of the spring to the pivot.

In my bl ind-fastener the spring is better protected from the rain, dust, snow, or ice than is the case in the other fastener.

I make no claim to the blind-fastener as described and claimed in the `aforesaid patent No. 84,661.

I am aware of the blind or shutter fastener shown and described in the United States Patent No. 107 ,210, and also of that in the application for a patent 'by G. H. Hersey, led May 11, 1860, and make no claim thereto; each of such fastenings being very different in construction from mine, or not having my improved con struction and arrangement of parts. In the sl1utterfastener of such patent 107,210 the sprin gboxis closed at its upper end and capped at its lower end, and made With openin gs in its sides, which serve to admit Water into the box; all of which is objectionable and dit'erent from anything in my blind-fastener, in

which there is no cap-plate below the catch-v by ice or snow; a difculty which my blindfastener is specially designed to avoid;

My construction of fastener simplifies it with reference to that of 'Hersey aud the patent 107 ,210, as mine, exclusive of the spring and confining-screw, has but two separate parts, three or more being necessary to each of the others; therefore Y' I claim- The combination of the open-ended flanged spring-case with the double catch-lever and the perforated and slotted pivot cast together in a single piece, the slot retaining the coiled spring placed Within the case, and a single screw securing all the parts together and to the shutter, all being substantially as shown and described.

Witnesses:

R. H. EDDY, S. N. PIPER.

J OHN ANDREWS. 

